MHT CET · Physics · Current Electricity
A galvanometer of resistance \(100 \Omega\) requires \(10 \mu\) A current for full scale deflection.
Now a resistance of \(1 \Omega\) is connected to convert it into an ammeter. The minimum
current required to obtain full scale deflection is
- A \(101 \mathrm{~mA}\)
- B \(1 \cdot 01 \mathrm{~mA}\)
- C \(11 \cdot 0 \mathrm{~mA}\)
- D \(10 \cdot 1 \mathrm{~mA}\)
Answer & Solution
Correct Answer
(B) \(1 \cdot 01 \mathrm{~mA}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} I &=\left(\frac{G+S}{S}\right) I_{g} \\ &=\left(\frac{100+1}{1}\right) \times 10 \mu A \\ &=1010 \mu A=1.01 \mathrm{~mA} \end{aligned}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A body of mass ' \(\mathrm{m}\) ' attached at the end of a string is just completing the loop in a vertical circle. The apparent weight of the body at the lowest point in its path is ( \(\mathrm{g}=\) gravitational acceleration)MHT CET 2023 Medium
- The electric potential at the centre of two concentric half rings of radii \(R_1\) and \(R_2\), having same linear charge density ' \(\lambda\) ' is ( \(\varepsilon_0=\) permittivity of free space \()\)
MHT CET 2024 Easy - In resonance tube, first and second resonance are obtained at depths \(22.7 \mathrm{~cm}\) and \(70.2 \mathrm{~cm}\) respectively. The third resonance will be obtained at a depthMHT CET 2023 Medium
- The magnetic energy' stored in an inductor of inductance \(5 \mu \mathrm{H}\) carrying a current of 2 A isMHT CET 2024 Easy
- The moment of inertia of a solid sphere of mass ' \(m\) ' and radius ' \(R\) ' about its diametric axis is 'I'. Its moment of inertia about a tangent in the plane isMHT CET 2025 Medium
- A particle starting from rest moves atong the circumference of a circle of radius ' \(r\) ' with angular acceleration ' \(\alpha\) '. The magnitude of the average velocity in time it completes the small angular displacement ' \(\theta\) ' isMHT CET 2024 Easy
More PYQs from MHT CET
- The value of \(\int(1-\cos x) \cdot \operatorname{cosec}^2 x \mathrm{~d} x\) isMHT CET 2023 Medium
- The rate of change of the volume of a sphere with respect to its surface area, when its radius is 2 cm, is _______ \(\mathrm{cm}^3 / \mathrm{cm}^2\).MHT CET 2024 Easy
- The logical expression \([p \wedge(q \vee r)] \vee[\sim r \wedge \sim q \wedge p]\) is equivalent toMHT CET 2020 Medium
- A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet while it is passing through the ring isMHT CET 2025 Medium
- A metal rod of Young's modulus 'Y' and coefficient of linear expansion ' \(\propto^{\prime}\) has its
temperature raised by ' \(\Delta \theta^{\prime} .\) The linear stress to prevent the expansion of rod is
(L and \(\ell\) is original length of rod and expansion respectively)MHT CET 2020 Easy - Which among the following is an alloy of antimony, tin and copper?MHT CET 2020 Easy